Dipper



E. E. CRANE DIPPER Sept. 9. 1924. v i A 1,507,697

Filed SeDt; 22 1923 Patented Sept. 9, 1924.

UNITED STATES PATENT OFFICE.

ERNEST EDGAR RAN, OF MINNEAPOLIS, MINNESOTA, ASSIGOR' T0 AMERICAN MANGANESE STEEL COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or MAINE.

DIPPER.

Application filed September 22, 1923. Serial No. 664,199.

To all whom it may cancer n:

Be it known that I, ERNEST EDGAR CRANE, a citlzen of the United States, residing at Minneapolis, in the County of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Dippers, Of which the following is a specification.

More particularly my invention relates to means for securing separable dipper teeth to a dipper front.

It is the usual practice to employ separable dipper teeth in connection with the dippers of excavating machines or the like for the reason that the teeth become-Worn and blunt after Continued use and therefore do not dig properly. To overcome this difiiculty, dipper teeth are usually reversible,

but even if the teeth are properly reversed they must be replaced eventually.

In some instances the teeth have been secured directly to the dipper front and in other instances a heavy base has been interposed between the dipper front and each tooth. The heavy base heretofore employed, in addition to serving as a support for a tooth, also served to strengthen the dipper front, but the objection to this design is that the base was not reversible, and a far better method of strengthening the dipper front is by the use of ribs formed integral therewith.

The main object of my invention is to provide improved means for securing a dipper tooth to a dipper front.

A further object of my invention is to provide an improved dipper tooth base which may be quickly and easily reversed in its position relative to its associated dipper front.

Another object of my invention is to provide a reversible dipper tooth base which in turn may accommodate a reversible dipper tooth.

Other objects of my invention will become apparent as the detail description progresses, reference being had to the accompanying drawing, wherein- Fig. 1 is an elevation of the dipper front as it appears when viewed from the interier of the dipper. FFig. 2 is a section taken on line 2-2 of ig. 1. A

Fig. 3 isa erspective view of a separable dipper tooth orming a part of my invention,

Fig. 4 is a perspective view of an improved dipper tooth base which is adapted to Carry the dipper tooth shown in Fig. 3, and

Fig. 5 is a fragmentary perspect-ive view of a portion of the dipper front which is adapted to receive the dipper tooth base shown in Fig. 4.

In the drawing, the reference Character 10 designates a dipper front having a plurality of exterior or interior integral ribs 11. The dipper front 10 may be secured to a suitable dipper by means well known to those sk'illed in the art. The forwardly extending ends of the integral ribs 11 are adapted to provide seats 12 for a plurality of dipper tooth bases 13, which are in turn adapted to accommodate a plurality of dipper teeth 14.

Each of the seats 12 formed upon the integral ribs 11 is provided With shoulders 15 and tapered bifurcations or notches 16. As shown in Figs. 1 and 2, each of the dipper tooth bases 13 comprises a pair of rear- Wardly extending arms 17, which conform to two opposing surfaces of its associated Seat 12,

and which are in abutting relation with the shoulders 15 when the base is secured upon the Seat by meansof one or more bolts or other means 18. It' will be noted that the several seats 12 and the several bases 13 are symmetrical in form, thus permitting reversal of the position which any one of the bases 13 occupies With respect to a Seat 12. Each of the bases 13 has an integral web or lug 20 adapted to fit snugly in the bifurcations or notches 16 of its associated Seat 12, to prevent lateral displacement of the base.-

Each base 13 has its forwardl extending end bifurcated, thus providing ifurcations 21, 21, which are adapted to receive between them a web 22 formed integral with the dipper tooth 14 associated With the base. The web 22 and the bifurcations 21 are apertured to receive a bolt 23, by means of which the dipper tooth is rigidly secured to the base. A nut 24 threaded upon a projecting end of the bolt 23 is protected by an arcuate fiange 25 formed upon the base. Each of the bifurcations 21 has a plurality of recesses 26 adapted-to receive a plurality of lugs 27 cast lnteg'ral with the dipper tooth 14. The lugs 27 prevent spreading of the bifurcations 21.

The front end of each of the bases 13 is wedge-Shaped, as is also each of the dipper teeth 14. This construction results in little loss of material when it becomes necessary to discard one of the dipper teeth 14 after the' tooth has become dulled or worn,

and permits the use of comparatively eX-' pensive metals in the manufacture of the dipper teeth.

It is apparent that the dipper teeth 14: are reversible With respect to the bases 13 and that this construction, coupled with the re- VerSible feature of the bases 13 with respect to the seats 12, is advantageous when coinpared With constructions in which the teeth alone are reversible, and in which the bases are designed to fulfill the functions C the integral ribs 11. In my construction the integral ribs 11 aid in giving a rigid dipper front of great Strength, and the bases are easily placed in position upon the seats 12 and easily reVersed with respect to the seats. Therefore, the operator may at any time either revese a dipper tooth or its associated base, depending upon the particular conditions attending atthat time.

I am aware that changes in the form, constructon and arrangement of parts may be made Without departing from the Spirit and without sacrifioing the advantages of the invention and I reserve the right to make all such changes as fairly fall within the Scope of the following Claims:

I claim:-

1. The combination with a dipper front, of a reversible dipper tooth base Secured to the front, and a reversible dipper tooth Secured to the base.

2. --The combination with a dipper front having a shouldered Seat ormed inte al therewith, of na Separable dipper tooth se mounted upon the shouldered Seat, and a eparable dipper tooth mounted upon the ase.

3. The combination having a bifurcated Seat formed integral therewith, a separable dipper tooth base Secured tothe Seat and having an' integral web disposed between the bifurcations of the Seat, and a, separable dipper tooth Secured to the' base.

4. The combination with a dipper front having a bifurcated rib formed integral therewith, of a bifurcated dip'per tooth base secured to the rib and having an integral With a dipper front web disposed between the bifurcations of the rib, and a dipper tooth secured to the base and having an integral web disposed between thebifurcations of the base.

ERNEST EDGAR CRANE. 

